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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1042) add ability to specify affinity/anti-affinity in container requests
Date Thu, 08 Aug 2013 08:29:48 GMT

    [ https://issues.apache.org/jira/browse/YARN-1042?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13733249#comment-13733249
] 

Junping Du commented on YARN-1042:
----------------------------------

Yes. It is pretty useful in cases specified in description. With this info of affinity and
anti-affinity, AM should have knowledge to translate container request to resource request
and ask for RM.
                
> add ability to specify affinity/anti-affinity in container requests
> -------------------------------------------------------------------
>
>                 Key: YARN-1042
>                 URL: https://issues.apache.org/jira/browse/YARN-1042
>             Project: Hadoop YARN
>          Issue Type: New Feature
>          Components: resourcemanager
>    Affects Versions: 3.0.0
>            Reporter: Steve Loughran
>
> container requests to the AM should be able to request anti-affinity to ensure that things
like Region Servers don't come up on the same failure zones. 
> Similarly, you may be able to want to specify affinity to same host or rack without specifying
which specific host/rack. Example: bringing up a small giraph cluster in a large YARN cluster
would benefit from having the processes in the same rack purely for bandwidth reasons.

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